Like everyone is saying an operation would be the only way to be changed. As for going back to 2 year old..Can not and will not happen. I honestly think if that is how you feel you should get some professional help.

Just because something is posted doesn't mean that it's gonna work. Especially a spell which promises to change your gender or your age. You cannot do this. You are your age for a reason.
If you feel that you must be a girl, get in touch with a good plastic surgeon.